In this paper, we study the vacuum pair creation in symmetrical chirped fields at finite spatial scales using the numerical Dirac-Heisenberg-Wigner (DHW) method [1]}. We consider oscillating field forms in cosine and sinusoidal form. We find that momentum spectrum is very sensitive to symmetrical chirp which exhibits different interference effect for different spatial scales as well as the carrier phase of field. The reduced particle number is in general enhanced with increasing chirp. In particular, at small spatial scale, the reduced particle number is enhanced at most by one or two orders when chirp is applied. Moreover it is found that the reduced particle number is further increased by symmetrical chirp at about two times compared to asymmetrical chirp.
We use natural units (\(\hbar =c=1\) ) and express all quantities in terms of the electron mass \(m\) .
